Aluminum Water Bottles vs Stainless Steel: Weight, Lining and Which to Choose
Aluminum water bottles are light and simple; a stainless bottle can be vacuum insulated. The detail that matters most on aluminum is the lining inside.
By Feng, Head of After-Sales Service & Online Marketing Lead
Aluminum water bottles are usually lighter than stainless steel bottles of the same shape and capacity, because aluminum's density is about 2.7 g/cm³, according to the Royal Society of Chemistry, against about 7.9 g/cm³ for 304 stainless steel. An aluminum bottle is usually single wall, so it does not keep drinks hot or cold for long, and it is normally lined so the drink does not touch the aluminum. A stainless steel bottle is heavier but can be double wall and vacuum insulated; on BG Drinkware's bottles, a 304 inner wall, or 316 on request, holds the drink directly. BG Drinkware, a drinkware manufacturer in Yongkang, China, makes single wall aluminum water bottles with a resin inner lining in 500 mL and 750 mL, alongside stainless steel bottles from 120 mL to 4,000 mL. Choose aluminum for light cold-water bottles, and stainless steel for insulation, hot drinks or a larger choice of sizes.
Why do aluminum water bottles have a lining?
The lining is what the drink touches, so it is the part to check.
- Aluminum wall
- Light, single layer, with a brushed or coated outside.
- Resin lining
- On BG Drinkware's aluminum bottles, a resin coating covers the inside so the drink does not touch the aluminum.
- Drink
- Touches only the lining and the cap.
Bare aluminum can react with acidic or salty drinks, which is why aluminum bottles are normally lined. Because the lining is the drink-contact surface, ask what it is made of and for a food-contact test report that covers the lining, including any BPA test your market asks for. Our guide to BPA free water bottles in bulk explains what a useful report names. See stainless steel water bottles.
Is aluminum or stainless steel better for a water bottle?
Aluminum wins on weight; stainless steel wins on insulation and range.
| Feature | Aluminum (BG Drinkware) | Stainless steel (BG Drinkware) |
|---|---|---|
| Density of the metal | About 2.7 g/cm³ | About 7.9 g/cm³ (304) |
| Build | Single wall | Single wall, vacuum insulated, or double wall on order |
| Drink touches | Resin lining | 304 stainless steel, or 316 on request |
| Keeps drinks hot or cold | No | Yes, when vacuum insulated |
| Dents | Usually more easily, as thin aluminum walls are softer | Less easily |
| Sizes at BG Drinkware | 500 mL and 750 mL | 120 mL to 4,000 mL |
Density compares equal volumes of metal. A finished bottle's weight also depends on wall thickness, cap and accessories, so compare complete samples of the same capacity. For a deeper look at the steel side, see stainless steel vs plastic water bottles and 18/8 vs 304 vs 316.
For what a second wall adds, see double wall vs single wall water bottles.
What aluminum bottles does BG Drinkware make?
Single wall, resin-lined, in two sizes.
The bottles in the photo show two cap options: a bamboo lid with a steel carry handle, and a black cap with a carabiner. Both are single wall, so they suit cold water and sports use rather than hot drinks or long insulation.
What should you ask before ordering aluminum bottles?
Lining, cap and care, then the usual quote details.
- What the inner lining is made of, and the food-contact report that covers it.
- Which drinks the bottle is meant for; single wall aluminum is not for hot drinks.
- The cap material and seal, such as bamboo, plastic or silicone parts.
- The outside finish and logo method, and how they wear on a softer metal.
- Care instructions for the lining, including whether dishwasher use is allowed.
Then send the usual details: capacity, quantity, model, colour, logo method, packaging, payment terms and trade terms. BG Drinkware's standard minimum order is 500 pieces and negotiable, a sample of an existing model takes up to 7 days, and bulk production takes 7–12 days after sample approval.
Aluminum water bottle FAQ
Are aluminum water bottles safe?
A lined aluminum bottle keeps the drink off the aluminum, so its safety depends mainly on the lining. BG Drinkware's aluminum bottles have a resin inner lining. Ask what the lining is made of and for a food-contact test report that covers it, including BPA if your market asks. Replace a bottle if the lining is scratched or damaged.
Can you put hot drinks in an aluminum water bottle?
It is not a good idea. A single wall aluminum bottle does not insulate, so the outside gets hot, and the lining has its own temperature limits. For hot drinks, choose a double wall vacuum insulated stainless steel bottle, which keeps the outside near room temperature. Use aluminum bottles for cold water and drinks at room temperature.
Is aluminum lighter than stainless steel?
Yes, for the same volume of metal. Aluminum's density is about 2.7 g/cm³ and 304 stainless steel's is about 7.9 g/cm³, so aluminum is roughly a third of the weight by volume. A finished bottle's weight also depends on wall thickness, cap and accessories, so compare complete samples of the same capacity.
Do aluminum water bottles keep water cold?
Not for long. Most aluminum bottles, including BG Drinkware's, are single wall, so heat passes through the thin metal wall and cold water warms up much faster than in a vacuum insulated bottle. To keep water cold for hours, choose a double wall vacuum insulated stainless steel bottle.
What sizes do BG Drinkware's aluminum bottles come in?
BG Drinkware makes its single wall aluminum water bottles in 500 mL, about 16.9 US fl oz, and 750 mL, about 25.4 US fl oz, with a resin inner lining. For other sizes, or for insulation, stainless steel bottles are available from 120 mL to 4,000 mL. Send the size, cap, colour and quantity for a quotation.
Sources
Aluminum or stainless for your range?
Send the size, cap, colour and quantity, and BG Drinkware will reply with a quotation for aluminum or stainless steel bottles.
